Erm ok so this isn't humanitarian aid. Column of over 20 APCs, 10km from the Ukraine border, and heading closer

— shaunwalker7 (@Shaun Walker)

4. Walker also tweeted that the group of vehicles — which included 23 armored craft as well as support trucks — was separate from a Russian aid convoy that deployed earlier this week.

Walker added that the vehicles didn’t look like a “proper invasion force.”

To clarify. APC column separate to humanitarian convoy, which has halted. Is moving V close to border. But not size of proper invasion force

— shaunwalker7 (@Shaun Walker)

NB I don't think this was "the invasion" proper. This is probably what has been happening for a while. Extraordinary to see it though.

— shaunwalker7 (@Shaun Walker)

7. Though Walker said the vehicles were “probably what has been happening for a while,” they’re likely to exacerbate fears about Moscow’s intentions in Ukraine.

Russian President Vladimir Putin’s announcement of the convoy took the world by surprise. And while Russia said the trucks were filled with things like food and sleeping bags, no one — including the Red Cross and the Ukrainian government in Kiev — knows for sure if that’s actually the case.

Some also believe Russia could be using the convoy to resupply rebels in the region, CBS News reports.

Walker reported Thursday that aid convoy trucks — which “do indeed appear to contain humanitarian aid” — stopped short of the Ukrainian border, while the military vehicles proceeded into Ukraine through a gap in a barbed wire fence. “Kiev has lost control of its side of the border in this area,” Walker added. He was unable to determine how long the vehicles would be in Ukraine, but said they prove that Russian troops are active across the border.